I just got it and it's an awesome addition to the SkyView AZ. It will fit the Sirius too but haven't tried that yet. But it is heavy, steel pipe I think, about 18 lbs? The AZ with scope attached is light and good for grab and go, but with the pier attached feels heavier than I'd like for G&G. But the height addition is worth it, and the weight keeps it stable as a rock.